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Camshafts

Marks on the chain links, and both sprockets can be applied by the holder and used to correct the orientation of Stars during assembly. This method is applicable when one condition - the asterisk must be installed without any violation of their initial orientation.

Tags mutual orientation
To maintain the relative orientation of the sprocket and chain advisable for each of the sprockets and the chain put on the relative orientation of the label, attach an asterisk to the chain and to provide reliable interlocking see. Figure (indicated by an arrow tying with insulating tube).

This method requires special care, but should greatly facilitate the work of the owner of the car, as there is no need to remove the cover of a chain drive timing.

The sequence of tightening of bolts of covers of basic necks


Withdrawal

PERFORMANCE ORDER

1. Remove the ignition distributor (see. Subsection 7.7.4). 2. Remove the chain and sprocket driven camshafts (see. Subsection 3.2.1.7). If the chain will remain on the engine, then put labels of mutual orientation (in Fig. Tags mutual orientation) and unscrew bolts of asterisks (see. p. 9, sub-section 3.2.1.7). 3. All covers of basic necks of cam are identical except for the front (right) cover for exhaust camshaft. Therefore, before removing the cap must be put on them identification tags. 4. At the top of the covers cast an arrow pointing in the correct orientation when assembling the cover (all the arrows should point in the direction of the chain). On camshafts intake and exhaust valves are distinguishing marks, - "I" camshaft intake valves and "E" on the exhaust camshaft. 5. Use a marker or scriber number all caps in order, starting from the front, arranged by the chain. This measure provides the installation of covers on former places in the assembly. 6. Loosen the bolts of covers of basic necks of a cam-working in the reverse order shown in Fig. Sequence of tightening of bolts of covers of basic necks. 7. Loosen the bolts in several stages, one turn for the reception. It is necessary for the uniform and gradual weakening forces from the valve springs acting on the cover. After a full release spring bolts can be turned completely. Cap bolts are divided lengthwise into three size groups, however, remember the location of the screw caps as they loosen. 8. Remove the covers of basic necks of the oil supply pipe, but with the 2nd valve stem, remove the cover plate. Remove the exhaust camshaft caps and then remove the camshaft itself. 9. Repeat steps according to AP. 6-8, and remove the cover inlet camshaft, and then remove the camshaft itself (note that these covers slinger plate is not).

Checking the Status

PERFORMANCE ORDER

1. Inspect the surface in contact with the camshaft bearing journals, in the cover and the cylinder head. Check for burrs on the surfaces and traces of deep development. Check the cam camshaft spalling traces of metal (parts of a bluish tint), deep development, chips, flat sections formed as a result of wear and tear. 2. Set the camshaft in a prismatic support and a dial gauge check the run-out in the middle of the neck. If palpation exceeds norm replace the camshaft. 3. micrometer measure the size of each of the cams camshafts and compare the results with those in podrazdele 3.2.1.1. If you find signs of damage or in case of increased wear, replace the camshaft. 4. Now check the clearance of the camshaft bearing journals. This can be done in two ways - either by direct measurement, or by using a plastic gauge Plastigage. 5. When measuring the clearance by the direct method, set the cover of basic necks of camshafts in the cylinder head, in accordance with the labels put before dismantling so as not to disturb the old order and orientation. Place lubricant tube and tighten the cap bolts to the specified torque in the sequence shown on the on Fig. Sequence of tightening of bolts of covers of basic necks. Measure the inner diameter of the bearing surfaces of covers and compare with this in podrazdele 3.2.1.1. If the internal diameter of any cap exceeds the limit, replace the cylinder head. 6. The gap is defined as the difference between the inner diameter of the bearing surface of the cover and the diameter of the base of the neck. 7. When measuring clearance with a plastic gauge Plastigage clean cloth clean lint-free camshafts and the bearing surfaces of the necks in the cylinder head and covers. Place the camshafts in the cylinder head. 8. Place the pieces of plastic gauge wire along the surfaces of basic necks of cam parallel to their axis. By taking measures to avoid the rotation of cam, follow the procedure set out in Nos. 3-11 (see. except for the steps involved in applying the sealant to the lid. 9. Remove the cover bolts (see. P. 6 above) and carefully remove the cover and the oil supply pipe, preventing the rotation of the camshaft. 10. Compare the largest width of the crushed wire on each neck with a scale on packing and define backlash caliber. 11. Compare the result of measurement specified in podrazdele 3.2.1.1. If the backlash exceeds norm a micrometer to measure the diameter of the neck of the camshaft bearing. If the diameter is less than the limit, replace the camshaft and recheck gaps in basic necks. If the gaps are still higher than normal, replace the cylinder head cover and the bearing journals.

Setting

PERFORMANCE ORDER

1. Make sure that each of the levers of engagement with the corresponding gidroregulyatorom and guide disk installed on one of the valves, which are actuated lever. 2. Liberally grease the bearing surface of the necks of the camshaft in the cylinder head with clean oil to the engine. 3. Install the camshafts to their seats in the cylinder head. Exhaust camshaft easily distinguished by the slot on the left side to drive the distributor of ignition. 4. Ensure that the crankshaft is in the top dead center of the compression stroke (at the toe of the crankshaft groove keyway must be turned vertically upwards, as viewed from the right side of the engine). 5. Install the camshafts to their seats in the cylinder head so that the cams of 1st cylinder have been turned away from the respective valve and guide the pins on the ends (indicated by arrows). When the correct position camshaft dowel pin inlet camshaft sprocket in the front part of it should be directed to 10 hours (when viewed from the right side of the engine), and the exhaust camshaft pin must be at the top upright. 6. Make sure the absolute purity of the contact surfaces of covers of basic necks and beds of the cylinder head, on these surfaces without any inclusions and traces of oil. Apply a thin layer of sealant on the surface of the split at the left cover for exhaust camshaft, which is marked by oblique hatching. 7. Install the cover of basic necks in the same manner, guided by the labels put at dismantling. 8. Install the valve stem plate on 2nd cover exhaust camshaft, set the lubricant tube. 9. Then install the oil inlet, strengthened their bolted covers of basic necks. Tighten bolts of covers of basic necks and tighten by hand. 10. Tighten the intake camshaft caps in sequence. Tighten bolts evenly, gradually increasing force, turning the screws on the turnover at a time, until the cover does not come in contact with the cylinder head (see. Fig. Sequence of an inhaling of bolts of covers of basic necks). Then tighten the bolts to the specified torque. Tighten only follow in this order to provide a uniform and gradual increase in efforts by the valve spring on the cover of basic necks. 11. Tighten the exhaust camshaft caps by repeating the preceding paragraph. 12. Install chain and camshaft sprocket (see. Subsection 3.2.1.7). 13. If the chain is not removed, then put an asterisk on the respective camshafts, put the chain, exactly matching the marks on the chains and sprockets to put before dismantling. Tighten bolts of asterisks, after wearing them washers, tighten bolts with the set moment. 14. Establish the ignition distributor (see. Subsection 7.7.4).